FEMA flood zone rules in Irvine, CA — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Irvine has flood risk areas primarily along San Diego Creek and its tributaries. FEMA Flood Insurance Rate Maps designate portions of the city as Special Flood Hazard Areas. The city's Grading and Building Codes require new construction in flood zones to meet elevation and construction standards. The Orange County Flood Control District manages regional flood infrastructure. Irvine participates in the National Flood Insurance Program.
The City of Irvine participates in the National Flood Insurance Program (NFIP) and provides flood hazard zone information to residents and property owners. FEMA Flood Insurance Rate Maps (FIRMs) and Flood Insurance Studies (FIS) identify Special Flood Hazard Areas (SFHAs) — areas with a 1% or greater annual chance of flooding (100-year floodplain). SFHAs include zones designated A, AE, AH, AO, and related variants. Construction in SFHA zones requires a FEMA permit for floodway encroachment, and the lowest floor (including basement) must be built above the Base Flood Elevation (BFE). Properties in SFHAs with federally-backed mortgages are required to carry flood insurance through the NFIP. Copies of FIRMs and FIS documents are available at Irvine Heritage Park Regional Library, Irvine City Hall (Community Development Department), or by calling 1-800-358-9616. Property owners can check flood zone status at the FEMA Map Service Center (msc.fema.gov). Most of central Irvine lies in a developed valley with engineered drainage, but areas near San Diego Creek, Peters Canyon Wash, and other waterways may be in or near flood zones. The City's Development Engineering Division administers flood insurance information.
Building code violation for non-compliant construction in SFHA. Permit denial for non-compliant projects. Required flood insurance for mortgaged properties in SFHA.
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Side-by-side rule comparisons with other cities in Orange County.
See how other cities in Orange County handle flood zones.
See how Irvine's flood zones rules stack up against other locations.
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